Pontiac Fiero 1988 Service Manual page 1136

POWER DOOR LOCKS: A U 3 E
TROUBLESHOOTING HINTS
• Try
the
following
checks before
doing
the
System Check.
1. Check the PWR ACC Circuit Breaker by
operating the Power Seats (if equipped).
2. Check the CTSY/LID Fuse by observing
that the Courtesy Lights come on when the
door is opened.
3. Check that the Door Lock Relay Assembly
case ground is making good contact.
4. If one of the Door Lock Motors does not
operate properly, but the other Door Lock
Motor functions normally, check the wiring
to the motor. If the wiring is correct, replace
that motor.
5. Check for mechanical binds in the Door Lock
System.
• Go to System Check for a guide to normal
operation.
• Go to System Diagnosis for diagnostic tests.
SYSTEM CHECK
• Use the System Check Table a s a guide to
normal operation.
• Refer to System Diagnosis for a list of symp-
" toms and diagnostic steps.
COMPONENT LOCATION
Page-Figure
Door Lock Motors In rear of each door 201-12-A
Door Lock Relay Assembly Near upper RH shroud. 201-12-D
FuseBlock. Behind LH side of I/P 201- 6-D
C200 (16 cavities) LH shroud ahead of center access hole 201- 6-D
C201 (8 cavities) LH shroud above center access hole 201-12-C
C307 (8 cavities) Near center of LH shroud 201-12-C
C308 (8 cavities) Near center of RH shroud 201-12-D
S125 Main harness, behind LH side of I/P, near Fuse
Block. 201- 6-D
S303 Crosscar harness, above steering column 201-12-B
SYSTEM CHECK TABLE
ACTION
NORMAL OPERATION
Operate the LH Door Lock Switch All the doors lock and unlock
Operate the RH Door Lock Switch All the doors lock and unlock
Unlock one door using the vehicle key
That door unlocks, but the other door remains
locked
With all the doors closed and locked, operate the
inside door handles to try and open each door
The doors will not open
Open the LH door and move the LH Door Lock
Switch to the LOCK position, close the door,
and try to open each door from the outside
The doors will not open
• Refer to System Diagnosis when a result is
not normal.
S Y S T E M D I A G N O S I S
• Do the tests listed for your symptom in the
Symptom Table below.
• Tests follow the Symptom Table.
SYMPTOM TABLE
SYMPTOM DO TEST
Only one of the
doors locks and
unlocks
A: Door Lock Motor
Test (on suspect
Door Lock
Motor)
(Continued on next page)